quadruple
1. [ verb ] increase fourfold
Examples:

"His stock earning quadrupled"

Related terms: multiply quadruplicate
2. [ adjective ] having four units or components
Synonyms: fourfold quadruplicate
Examples:

"quadruple rhythm has four beats per measure"

Related terms: multiple
3. [ adjective ] four times as great or many
Synonyms: fourfold
Examples:

"a fourfold increase in the dosage"

Related terms: multiple
4. [ adjective ] having four units or components
Synonyms: quadruplex quadruplicate fourfold
Examples:

"quadruple rhythm has four beats per measure" "quadruplex wire"

Related terms: multiple
5. [ noun ] (mathematics) a quantity that is four times as great as another
Related terms: multiple quadruplicate
Similar spelling:   quadruplex
  quadruplet
  quadruped
  quadrupling
  quadrupedal
  quadriplegic
  quadriplegia